package com.atguigu.gulimall.seckill.scheduled;

import com.atguigu.gulimall.seckill.service.Impl.SeckillServiceImpl;
import com.atguigu.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品定时上架：
 *  每天晚上3点 上架最近三天需要秒杀的商品
 *  当天00:00:00 - 23:59:59
 *  明天00:00:00 - 23:59:59
 *  后天00:00:00 - 23:59:59
 */
@Slf4j
@Service
public class SeckillSkuScheduled {

    @Resource
    SeckillService seckillService;

    @Autowired
    RedissonClient redissonClient;

    private final String upload_lock = "seckill:upload:lock";

    //TODO 幂等性处理
    @Scheduled(cron = "0 * * * * ?")
    public void uoploadSeckillLatest3Days(){
        //1.重复上架无需处理
        log.info("上架秒杀商品");
        //分布式锁。锁的业务执行完成 状态已经更新完成 释放锁之后 其他人获取到就会拿到最新的状态
        RLock lock = redissonClient.getLock(upload_lock);
        lock.lock(10, TimeUnit.SECONDS);
        try {
            log.info("获取到锁");
            seckillService.uploadSeckillSkuLatest3Days();
            log.info("执行完成");
        }finally {
            lock.unlock();
        }

    }
}
